docs: def com_google_fonts_check_metadata_match_filename_postscript(font_metadata):
    """METADATA.pb font.filename and font.post_script_name
       fields have equivalent values?
    """
    post_script_name = font_metadata.post_script_name
    filename = os.path.splitext(font_metadata.filename)[0]
  
    if filename != post_script_name:
      yield FAIL, ("METADATA.pb font filename=\"{}\" does not match"
                   " post_script_name=\"{}\"."
                   "").format(font_metadata.filename,
                              font_metadata.post_script_name)
    else:
      yield PASS, ("METADATA.pb font fields \"filename\" and"
                   " \"post_script_name\" have equivalent values.")